Optical position sensing for well control tools

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 47/09 (2006.01) E21B 34/14 (2006.01) E21B 47/12 (2006.01)

Patent

CA 2466761

An apparatus and methods are disclosed for using optical sensors to determine the position of a movable flow control element in a well control tool. A housing has a movable element disposed within such that the element movement controls the flow through the tool. An optical sensing system senses the movement of the element. Optical sensors are employed that use Bragg grating reflections, time domain reflectometry, and line scanning techniques to determine the element position. A surface or downhole processor is used to interpret the sensor signals.

L'invention concerne un appareil et des procédés qui utilisent des capteurs optiques afin de déterminer la position d'un élément de contrôle de l'écoulement mobile dans un outil de contrôle de puits. Un logement comprend un élément mobile disposé à l'intérieur de l'outil de manière que le mouvement de l'élément contrôle l'écoulement à travers cet outil. Un système de détection optique détecte le mouvement de l'élément. Les capteurs optiques de l'invention sont des capteurs optiques utilisant les réflexions du réseau de Bragg, la réflectométrie temporelle, et des techniques de balayage linéaires afin de déterminer la position de l'élément. Enfin, un processeur de surface ou de fond est utilisé afin d'interpréter les signaux de détection.

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